The power time curves of the micelle formation process were determined for quasi-surfactants [mono(2-ethyl-hexyl)-2-ethyl-hexyl phosphate nickel and mono(2-ethyl-hexyl)-2-ethyl-hexyl phosphate cadmium] and two kinds of solvent, n-chain alkalies (decane, dodecane, and tetradecane) and single-ring aromatic hydrocarbons (benzene. toluene. and dimethylbenzene) with sec-octyl alcohol by titration microcalorimetry The critical micelle concentration (cmc), aggregation number (n), formation constant of the micelle (K), and thermodynamic functions (Delta(r)H(m)(0) Delta(r)G(m)(0), and Delta(r)S(m)(0)) are obtained For different quasi-surfactants and solvents, the relationships between the solvent properties with the cane and the thermodynamic functions of the surfactants are discussed